code: def normalize_intensity(audio_arr, input_low, input_high):
      denominator = input_high - input_low
  
      if denominator == 0:
          # all values are same
          if input_low == 0:
              return audio_arr  # output all values are 0
          else:
              return audio_arr / input_low  # output all values are 1
  
      return (audio_arr - input_low) / denominator
  
file_path: nnabla/python/src/nnabla/utils/audio_utils/common.py
imports: from __future__ import division, absolute_import
  import os
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: normalize_intensity(audio_arr, input_low, input_high) and returns: unknown, audio_arr, unknown